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Broadening the optical bandwidth of quantum cascade lasers using RF noise current perturbations

Abstract:

We report on the broadening of the optical bandwidth of a distributed feedback quantum cascade laser (QCL) caused by the application of radio frequency (RF) noise to the injection current. The broadening is quantified both via Lamb-dip spectroscopy and the frequency noise power spectral density (PSD). The linewidth of the unperturbed QCL (emitting at ∼5.3  μm) determined by Lamb-dip spectroscopy is 680±170  kHz, and is in reasonable agreement with the linewidth of 460±40  kHz estimated by int...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted Manuscript

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Publisher copy:
10.1364/ol.43.001931

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More by this author
Institution:
University of Oxford
Division:
MPLS Division
Oxford college:
St Hildas College
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Chemistry; Physical & Theoretical Chem
Oxford college:
Worcester College
Role:
Author
Publisher:
Optical Society of America Publisher's website
Journal:
Optics Letters Journal website
Volume:
43
Issue:
8
Pages:
1931-1934
Publication date:
2018-04-13
Acceptance date:
2018-03-01
DOI:
EISSN:
1539-4794
ISSN:
0146-9592
Pubs id:
pubs:840451
URN:
uri:5ea0bd82-def8-47c4-b3ef-c9ce57bee682
UUID:
uuid:5ea0bd82-def8-47c4-b3ef-c9ce57bee682
Local pid:
pubs:840451
Language:
English

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